Evaluation of flood-resistant capacity of scoured bridges

Yung Yen Ko, Jiunn Shyang Chiou, Yu Ching Tsai, Cheng Hsing Chen, Helsin Wang, Chung Yue Wang

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The exposure of pier foundations owing to scour significantly reduces the foundation-bearing capacity and diminishes the flood-resistant capacity of a bridge. This paper proposes a nonlinear quasi-static analysis procedure for the performance of bridges with pile foundations under flow-induced loads for the evaluation on the flood-resistant capacity of scoured bridges. The Winkler beam model is adopted for the modeling of the pile-soil system, and the distributed hinge model is utilized to simulate the possible flexural failure of the piles. Soil springs with nonlinear p-y curves are used to represent the nonlinearity of the supporting soil. To demonstrate this procedure, a case study on the Shuang-Yuan Bridge in Taiwan was performed for various flood and scour conditions. This bridge was partially demolished in a major flood event caused by Typhoon Morakot in 2009. According to the analysis results, a possible scenario for the failure of the Shuang-Yuan Bridge is presented, and the proposed method is shown to give a reasonable assessment of the flood-resistant capacity of bridges with scoured pile foundations.

Original languageEnglish
Pages (from-to)61-75
Number of pages15
JournalJournal of Performance of Constructed Facilities
Issue number1
StatePublished - 1 Feb 2014


  • Bridge scour
  • Distributed hinge model
  • Flood-resistant capacity
  • Foundation exposure
  • Nonlinear p - y curve
  • Winkler beam model


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